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The purpose of this study is to assess whether treatment with the study drug tetrahydrouridine-decitabine (THU-Dec) in combination with nivolumab is more effective than treatment with nivolumab alone in patients with NSCLC.
Decitabine is an investigational (experimental) drug that works by depleting DNA methyltransferase 1 (DNMT1). DNMT1 is an enzyme, or protein that causes chemical changes, often increased in cancer. Blocking DNMT1 has been shown to reduce tumor formation. Decitabine is experimental in this study because it is not approved by the Food and Drug Administration (FDA) for patients with lung cancer. Decitabine is approved by the FDA for treating patients with a blood disease called myelodysplastic syndrome (MDS, a condition where the bone marrow does not make blood cells normally).
THU is an investigational (experimental) drug that works by blocking an enzyme that breaks down decitabine. This enzyme is highly expressed in solid tissues of the body, limiting the distribution of decitabine into these tissues, including solid cancer tissues. So, THU will increase the time cells are exposed to decitabine. The idea is that THU will also increase the time that the lung cancer cells are exposed to decitabine. THU is experimental because it is also not approved by the FDA, although it has been extensively used in clinical trials, including several cancer trials.
Full description
Primary objective: To determine if non-cytotoxic oral THU-Dec when combined with nivolumab can improve objective response rates of nivolumab
Secondary objectives:
i) To evaluate clinical efficacy end points and toxicity of oral THU-Dec when combined with nivolumab ii) evaluate the induction of a T-cell response in patients with metastatic NSCLC iii) To evaluate hypotheses regarding mechanisms of resistance and predictive biomarkers for response to nivolumab
Study design: This is a Phase 2 randomized two arm trial of nivolumab alone or in combination with THU-Dec, in previously treated patients with stage IV Non-Small Cell Lung Cancer (NSCLC). The primary goal of this trial is to compare the efficacy of oral THU-Dec as a way of enhancing the anti-tumor immune response to nivolumab to that of nivolumab alone. The primary efficacy endpoint is overall RECIST-defined response. To accomplish this goal 60 patients will be randomized 2:1 to THU-Dec plus nivolumab or nivolumab only respectively.
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Inclusion criteria
Histologically or cytologically-proven NSCLC
Subjects must have received 1 or more prior systemic therapies for this disease, should not have had prior treatment with immunotherapy; (including immune checkpoint inhibitor drugs, or immunotherapy vaccines); Patients with epidermal growth factor receptor (EGFR) or ALK alterations will need to have progressed on a TKI treatment
Measurable disease per RECIST1.1
Disease that can be accessed by a bronchoscopic, surgical or percutaneous biopsy
Eastern Cooperative Oncology Group (ECOG) performance status 0 - 2
Adequate organ function as defined by the following criteria:
Patients with history of brain metastases can be eligible for study treatment at a minimum of 1 weeks following the completion of gamma knife or whole brain radiotherapy. (if patient underwent surgical resection of brain metastasis need to wait for 4 weeks before study treatment) Patients should ideally be off steroids at the start of study treatment, however patients on steroid taper and dose of no more than 2mg/day of Decadron at the time of study treatment are allowed; and steroids should be tapered off as quickly as clinically feasible.
Subjects must have the ability to understand and the willingness to sign a written informed consent document.
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13 participants in 2 patient groups
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Data sourced from clinicaltrials.gov
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